7Godbold D L,Horst W J,Marshner H,et al. Root growth and Zn uptake by two ecotypes of Deschampsia caespitosa as affected by high Zn concentration [J]. Plant Physiol, 1983,112 : 315 -333.
8Assche F V, Clijsters H. Effects of metals on enzyme activity in plant [ J ]. Plant Cell Env, 1990,13 : 195 - 206.
9Harrison M D, Jones C E, Damercon C T. Copper chaperones: function structure and copper-binding properties [ J ]. J Biol Inorg Chem, 1999 (4) :145 - 153.
10Kahle H. Response of roots to stress of heavy metals [ J ]. Env Exp Bot, 1993,33:99 - 119.
